@neil @Edent @falken interestingly my FTTP has a battery backup. Not actually sure how long it lasts, but apparently they don't bother fitting it in newer installs. Always wondered why they did, perhaps on case you take the fibre phone option?
I feel like I had something like this many years ago, but it was so long it may not have been the same daemon on Linux. Not sure I lose power enough to worry these days
@falken @neil @Edent in my case I have no phone line, but yes that was my assumption as to why they came with batteries. Perhaps friends who didn't get that option still have their copper POTS still in use